1. Tumor Immunobiology Program, James Graham Brown Cancer Center, Department of Microbiology and Immunology, University of Louisville Health Sciences Center, KY;
2. Section of Clinical Biochemistry, Department of Medical Biochemistry, University of Bari, Italy;
3. Section of General Pathology and Immunology, University of Brescia, Brescia, and Istituto Clinico Humanitas, Rozzano, Italy